Several chapters in this book draw extensively on published essays. These are all listed in the bibliography and I am grateful to the various publishers for permitting me to make use of this material here.
Thanks must go, above all, to Bryan Cleal and Warren Giles, who spent many months as participant observers in a number of settings where VR is being developed and used. I am also grateful to those who allowed Bryan and Warren to work with them: Michael Clark of the West Denton High School, Peter Dzwig at the London Parallel Applications Centre, Andrew Nimmo and Mel Slater of the computer science department at Queen Mary and Westfield College, Ian Andrew and colleagues at Dimension International, John Wilson and Sue Cobb of the Nottingham University Virtual Reality Applications Research Team, David Steward of the Shepherd School, Simon Rushton and Robin Taylor of the Department of Psychology at Edinburgh University, and Mike Bevan of VR News.
It is also a pleasure to acknowledge the generosity of my hosts and discussion partners. Linda Houseman at the University of North Carolina at Chapel Hill and Ann Elias at the University of Washington's Human Interface Technology Laboratory kindly helped with my arrangements for visiting these institutions. Terry Rowley took the time to give me an informative tour of W Industries. Dutch Guckenberger supervised my F-16 flight and Steve Benford and his colleagues introduced me to networked Doom, among other things. I am grateful to Stephen Ellis of NASA Ames Research Center, Mike Moshell of Institute for Simulation and Training at the University of Central Florida, Pavel Curtis at the Xerox Palo Alto Research Center (PARC), and Warren Robinett for providing friendly interfaces to a nonspecialist. Shinji Tanaka made my visit to Japan most enjoyable, and Katzutomo Fukuda of Fujitsu, Susumu Tachi of the University of Tokyo, and Norihiko Matsuura of the Nippon Telegraph and Telephone Human Interface Laboratories (NTT) were likewise generous hosts.